Reco QA - primary vertex

The current update address to issues:

• primary vertex finder procedure. The hard-codded cut on a primary vertex contributor track to have STS+TRD+ToF hits is exposed to the user. The results of various quality cuts on tracks are also marked. Final result is that the user can identify which track from the event DO contribute to the PV definition and make informed selection.
• monitoring the above mentioned features and track projection to user predefined z planes. Results from such procedure can be looked for here : https://indico.gsi.de/event/19534/contributions/82199/attachments/48667/70662/Qa_AB_240919.pdf

of interest to the following people : @osingh @s.zharko and @i.selyuzhenkov

core/data/global/CbmVertex.cxx

-/* Copyright (C) 2005-2020 GSI Helmholtzzentrum fuer Schwerionenforschung, Darmstadt
+/* Copyright (C) 2005-2024 GSI Helmholtzzentrum fuer Schwerionenforschung, Darmstadt
    SPDX-License-Identifier: GPL-3.0-only
-   Authors: Volker Friese, Florian Uhlig, Denis Bertini [committer] */
+   Authors: Volker Friese, Florian Uhlig, Alex Bercuci, Denis Bertini [committer] */
 
 // -------------------------------------------------------------------------
 // -----                       CbmVertex source file                   -----
@@ -178,5 +178,45 @@ string CbmVertex::ToString() const
 }
 // -------------------------------------------------------------------------
 
+// -------------------------------------------------------------------------
+int32_t CbmVertex::GetTrackIndex(int32_t iTrack) const
+{
+  if (iTrack < 0 || iTrack >= fNTracks) {
+    LOG(warning) << GetName() << "::GetTrackIndex(" << iTrack << ") : outside range.";
+    return -1;
+  }
+  if (!fTrkIdx.size() || size_t(iTrack) >= fTrkIdx.size()) return -1;
+  return fTrkIdx[iTrack];
+}
+// -------------------------------------------------------------------------
+
+// -------------------------------------------------------------------------
+bool CbmVertex::FindTrackByIndex(uint32_t iTrack) const
+{
+  auto idx = find_if(fTrkIdx.begin(), fTrkIdx.end(), [iTrack](uint32_t p) { return p == iTrack; });
+  if (idx != fTrkIdx.end()) return true;
+  return false;
+}
+// -------------------------------------------------------------------------
+
+// -------------------------------------------------------------------------
+bool CbmVertex::SetTracks(std::vector<uint32_t>& indexVector)
+{
+  fTrkIdx = indexVector;
+
+  if (!fNTracks)
+    fNTracks = fTrkIdx.size();
+  else {
+    if (size_t(fNTracks) != fTrkIdx.size()) {
+      LOG(error) << GetName()
+                 << "::SetTracks() : fNTracks does not match fTrkIdx info. This might point to a problem !";
+      fNTracks = fTrkIdx.size();
+      return false;
+    }
+  }
+
+  return true;
+}
+// -------------------------------------------------------------------------
 
 ClassImp(CbmVertex)